Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TAP SELECTING APPARATUS AND ATMOSPHERIC PRESSURE ADJUSTMENT METHOD
Document Type and Number:
Japanese Patent JP2010147074
Kind Code:
A
Abstract:

To prevent oxidizing degradation of insulating medium and degradation in the insulation performance.

A tap selecting apparatus 101 includes a case 23 filled with insulating medium 15; a tap selector 21 which is arranged outside the case 23 and selects at least one tap from among a plurality of taps provided at a plurality of positions of a winding which a transformer 10 contains; a selecting switch 22, which is arranged inside the case 23 and has a contact point 60 where a load current between the tap selected by the tap selector 21 and a predetermined node flows to switch the contact point 60; a conservator 41, which communicates with the case 23 to form an interface between the insulating medium 15 and gas; a non-oxygen supplier 39 for supplying non-oxygen gas to at least one of the case 23 and the conservator 41; and a valve 45, which is connected to the conservator 41 and regulates a stream of air from outside of the tap selecting apparatus 101 to the conservator 41.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
MIHARA YUJI
Application Number:
JP2008319691A
Publication Date:
July 01, 2010
Filing Date:
December 16, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H01F27/02; H01F27/14; H01F29/04
Domestic Patent References:
JPS639113U1988-01-21
JPH04127617U1992-11-20
JP2004079920A2004-03-11
JPH042102A1992-01-07
JPS63131534U1988-08-29
JPS639113U1988-01-21
JPH04127617U1992-11-20
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
Nobuo Arakawa